Nissan Maxima

Where are O2 sensors located on 1999 Maxima?


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Wiki User
2015-07-14 15:06:01
2015-07-14 15:06:01

I found this great site about Nissan O2 and its location to fix with diagrams! The URL listed below is for a 2000... Try the dropdowns for the 1999.


Thanks... Jim


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O2 sensors are always located on the exhaust system.O2 sensors are always located on the exhaust system.

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There is a total of 3 O2 sensors 2 Upstream and 1 Downstram

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The O2 sensors are located between the exhaust manifolds and the cat converter. They screw in to the head pipes. Those are also called upstream O2 sensors and in some vehicles they are also called air/fuel sensors. There are also downstream O2 sensors that are located after the catalytic converter.

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All O2 sensors are threaded into the exhaust system at various points. Upstream O2 sensors are located before the catalytic converter(s) and downstream O2 sensors are located after the catalytic converter(s).

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There are 2 sensors. One in front of the catalytic converter and one behind it.

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